Maths glossary
Clear, plain-English definitions of the maths and teaching terms that come up most, each with examples and free worksheets to practise.
Area is the amount of flat space a 2D shape covers, measured in square units.
A decimal uses a point to show parts of a whole smaller than one.
A factor is a whole number that divides exactly into another number.
A fraction shows equal parts of a whole, written as a numerator over a denominator.
A multiple of a number is what you get when you multiply it by a whole number.
A number bond shows how a number splits into two parts that add back to the whole.
The numerator is the top number of a fraction; the denominator is the bottom number.
Perimeter is the total distance around the outside of a shape.
Place value is the idea that a digit's position decides what it is worth.
A prime number has exactly two factors: 1 and itself.
Regrouping is the carrying and borrowing used in column addition and subtraction.